<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8" /> 
        <title>Weather Example</title>
        <!-- import Vue -->
        <script type="text/javascript" src="../js/vue.js"></script>
    </head>
    <body>
        <div id="root">
            <h2>今天天气很{{info}}</h2>
            <!-- 绑定事件的时候@xx="yyy" yyy可以写一写简单的语句 -->
            <!-- <button @click="isHot = !isHot">点击切换（简写）</button> -->
            <button @click="changeWeather">点击切换</button>
        </div>
    </body>
            
    <script type="text/javascript">
        Vue.config.productionTip = false // 阻止vue在启动时生成生产提示。
        new Vue({
            el:'#root',
            data:{
                isHot: true
            },
            computed:{
                info(){
                    return this.isHot? "炎热" : "凉爽"
                }
            },
            methods: {
                changeWeather(){
                    this.isHot = ! this.isHot
                }
            },
        })
    </script>
</html>